Hoodies and sweatshirts are usually made with the grain of the fabric running vertically, risking the fabric becoming very long after use. By flipping the grain of the fabric sideways as well as adding side panels odds are in your favor that your sweatshirt will preserve its original shape/form.
Unlikely to shrink in the washer nor will easily tear as the Champion Reverse Weave is also woven with a HEAVY fabric which thereby also makes it a bit stiff, giving it more character and a more premium feel. An icon amongst hoodies and sweatshirts and used as the base for many large fashion brands such as GALLERY DEPT. and OFF-WHITE!